Question

- The metallic bob of a simple pendulum of mass 0.5
kg carries a positive charge of 0.25 C. If the pendu-
lum is suspended in an electric field of strength 15 N
C^-1 directed from east to west, state the forces acting
on the bob and derive the condition for equilibrium.
Also find the angle subtended at the equilibrium.
(Take g = 10 m s^-2)​

Answer 1

Answer:

the Bob will be in equilibrium at angle theta towards West .

forces acting: tension, weight and force due to electric field=qE

Tcos theta= mg

Tsin there=qE

theta= tan inverse (qE/mg)

Answer 2

Explanation:

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